Galvanising and epoxy-coating production line

ABSTRACT

A galvanising epoxy-coating production line includes a sandblasting machine an assisting plating machine, a first air knife, a first pre-heater, a hot dip tank, a second air knife, a second pre-heater, an epoxy spray chamber, and a cooling chamber, arranged sequentially in order of workflow. The assisting plating machine, the first air knife, the first pre-heater, the hot dip tank, the second air knife, the second pre-heater, and the epoxy spray chamber are provided with moving channels through which workpieces can pass. Between the devices is provided with a rolling conveyer on which the workpieces run. The production efficiency is high. The electroplated rebars are long.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a production line, and moreparticularly to a galvanising and epoxy-coating production line.

2. Description of the Prior Art

A coating production line is used for metal and non-metal to be coatedwith a protection layer or a decoration layer. The quality of coatingwill influence the appearance of the product and the capability ofcorrosion-resistance and weather-resistance. With the development ofindustrial technology, a coating line is developed from by hand toautomation. The coating line is widely used in various fields. As shownin FIG. 8, a conventional galvanising coating production line comprisesthe process of pretreatment 1′, assisting plating 2′, preheating 3′,galvanising 4′, cooling 5′, and passivation 6′. It is operated by asuspension crane (or an electric hoist operated by hand) to hangworkpieces (such as rebars). Because this conventional production lineuses an electric hoist or a trolley conveyer to hang workpieces, thelength of the workpieces to be electroplated is limited. For large-sizedworkpieces, the depth of the galvanising tank must be deep. As a result,the equipment is large in size, and the production efficiency is low.

Accordingly, the inventor of the present invention has devoted himselfbased on his many years of practical experiences to solve theseproblems.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a galvanisingand epoxy-coating production line. The production efficiency is high.The electroplated rebars can be long.

In order to achieve the aforesaid object, the galvanising andepoxy-coating production line of the present invention comprises asandblasting machine, an assisting plating machine, a first air knife, afirst pre-heater, a hot dip tank, a second air knife, a secondpre-heater, an epoxy spray chamber, and a cooling chamber which arearranged sequentially according to a workflow. The assisting platingmachine, the first air knife, the first pre-heater, the hot dip tank,the second air knife, the second pre-heater, the epoxy spray chamber,and the cooling chamber are each provided with a moving channel throughwhich workpieces can pass. Between the devices is provided with arolling conveyer on which the workpieces run.

Preferably, the assisting plating machine includes upper and lower rowsof assisting plating heads. Between the upper and lower rows ofassisting plating heads is the moving channel for the workpieces to passthrough the assisting plating machine

Preferably, the first air knife and the second air knife have anidentical structure. The first air knife comprises a triangular frame.An air wall of the triangular frame is provided with a plurality of airnozzles. A middle portion of the triangular frame is defined as themoving channel for the workpieces to pass through the first air knife.

Preferably, the first pre-heater and the second pre-heater have anidentical structure. The first pre-heater comprises a support, a guidepipe, and a heating wire. The guide pipe is installed on the support.The support is fixed on the ground. The heating wire is wound on theguide pipe. The guide pipe is provided with a plurality of guide holes.The guide holes are the moving channel for the workpieces to passthrough the first pre-heater.

Preferably, the hot dip tank comprises a big tank, a small tank, and anelectroplating solution circulatory system. The small tank is placed inthe big tank. An upper portion of the small tank is beyond a top of thebig tank. Two opposing walls of the small tank, beyond the big tank, areformed with through holes respectively. The through holes of the twoopposing walls of the small tank are disposed at an axis. The throughholes of the two opposing walls of the small tank are the moving channelfor the workpieces to pass through the hot dip tank.

Preferably, the epoxy spray chamber includes upper and lower rows ofepoxy spray heads. Between the upper and lower rows of epoxy spray headsis the moving channel for the workpieces to pass through the epoxy spraychamber.

Preferably, between the sandblasting machine and the assisting platingmachine, between the first air knife and the first pre-heater, betweenthe first pre-heater and the hot dip tank, between the second pre-heaterand the epoxy spray chamber, and between the epoxy spray chamber and thecooling chamber is provided with the rolling conveyer on which theworkpieces run.

As the assisting plating machine, the first air knife, the firstpre-heater, the hot dip tank, the second air knife, the secondpre-heater, and the epoxy spray chamber are provided with the movingchannels through which workpieces can pass, rebars can lie flat and passone-by-one through the devices in the order of workflow. The productionefficiency is high, the electroplated rebars are long, and each devicecan be added or removed according to coating requirements. Theproduction line is structurally compact, highly modular, and extensionor improvement thereof is simple.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural schematic view of the present invention;

FIG. 2 is a perspective schematic view of the assisting plating machineof the present invention;

FIG. 3 is a perspective schematic view of the first pre-heater of thepresent invention;

FIG. 4 is a perspective schematic view of the hot dip tank and thesecond air knife of the present invention;

FIG. 5 is a perspective schematic view of the epoxy spray chamber of thepresent invention;

FIG. 6 is a perspective schematic view of the cooling chamber of thepresent invention;

FIG. 7 is a schematic view of the working process of the presentinvention; and

FIG. 8 is a structural schematic view of a conventional galvanisingcoating production line.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Embodiments of the present invention will now be described, by way ofexample only, with reference to the accompanying drawings.

As shown in FIG. 1, the present invention discloses a galvanising andepoxy-coating production line. The galvanising and epoxy-coatingproduction line comprises a sandblasting machine 1, an assisting platingmachine 2, a first air knife 3, a first pre-heater 4, a hot dip tank 5,a second air knife 6, a second pre-heater 7, an epoxy spray chamber 8,and a cooling chamber 9 which are arranged sequentially according to aworkflow.

The assisting plating machine 2, the first air knife 3, the firstpre-heater 4, the hot dip tank 5, the second air knife 6, the secondpre-heater 7, the epoxy spray chamber 8, and the cooling chamber 9 areeach provided with a moving channel through which workpieces can pass.Between the sandblasting machine 1 and the assisting plating machine 2,between the first air knife 3 and the first pre-heater 4, between thefirst pre-heater 4 and the hot dip tank 5, between the second pre-heater7 and the epoxy spray chamber 8, and between the epoxy spray chamber 8and the cooling chamber 9 is provided with a rolling conveyer 10 onwhich the workpieces run.

As shown in FIG. 2, the assisting plating machine 2 includes upper andlower rows of assisting plating heads, namely, a row of upper assistingplating heads 21 and a row of low assisting plating heads 22. Betweenthe row of upper assisting plating heads 21 and the row of lowerassisting plating heads 22 is the moving channel for the workpieces topass through the assisting plating machine 2. In this embodiment, thereare two assisting plating machines 2.

As shown in FIG. 4, the first air knife 3 and the second air knife 6have an identical structure. The second air knife 6 comprises atriangular frame 61 and an air pipe 62. An air wall of the triangularframe 62 is provided with a plurality of air nozzles 63. A middleportion of the triangular frame 61 is defined as the moving channel forthe workpieces to pass through the second air knife 6.

As shown in FIG. 3, the first pre-heater 4 and the second pre-heater 7have an identical structure. The first pre-heater 4 comprises a support41, a guide pipe 42, and a heating wire 43. The guide pipe 42 isinstalled on the support 41. The support 41 is fixed on the ground. Theheating wire 43 is wound on the guide pipe 42. The guide pipe 42 isprovided with a plurality of guide holes 421. The guide holes 421 arethe moving channel for the workpieces to pass through the firstpre-heater 4.

As shown in FIG. 4, the hot dip tank 5 comprises a big tank 51, a smalltank 52, and an electroplating solution circulatory system 53. The smalltank 52 is placed in the big tank 51. An upper portion of the small tank52 is beyond a top of the big tank 51. Two opposing walls of the smalltank 52, beyond the big tank 51, are formed with through holes 521, 522respectively. The through holes 521, 522 of the two opposing walls ofthe small tank 52 are disposed at an axis. The through holes 521, 522 ofthe two opposing walls of the small tank 52 are the moving channel forthe workpieces to pass through the hot dip tank 5.

As shown in FIG. 5, the epoxy spray chamber 8 includes upper and lowerrows of epoxy spray heads, namely, a row of upper epoxy spray heads 81and a row of lower epoxy spray heads 82. Between the row of upper epoxyspray heads 81 and the row of lower epoxy spray heads 82 is the movingchannel for the workpieces to pass through the epoxy spray chamber 8.

As shown in FIG. 6, the cooling chamber 9 comprises an upper lid 91, awater tank 92, a plurality of shower heads 93, and a water inlet pipe94. The water inlet pipe 94 is connected with a water source. The upperlid 91 is to cover the shower heads 93. The water tank 92 is installedon the ground and located under the shower heads 93.

As shown in FIG. 1 and FIG. 7, the working process of the presentinvention is that the workpieces (rebars) 30 pass through thesandblasting machine 1, the assisting plating machine 2, the first airknife 3, the first pre-heater 4, the hot dip tank 5, the second airknife 6, the second pre-heater 7, the epoxy spray chamber 8, and thecooling chamber 9 sequentially. Finally, the processed workpieces 30 arecollected on a rebar collection rack 20 disposed at the tail end of theproduction line. Each working process is controlled by a unified controlelectrical box. The specific steps are as follows:

1. the workpieces 30 pass through the sandblasting machine 1 forremoving oil and dust;

2. the workpieces 30 pass through the assisting plating machine 2 andthe first air knife 3 for applying a plating assistant agent evenly anddrying so that electroplating solution can be adhered to the surfaces ofthe workpieces 30 effectively when electroplated;

3. the workpieces 30 pass through the first pre-heater 4 for drying thesurfaces of the workpieces 30 by heat;

4. the workpieces 30 enter the hot dip tank 5 from the through hole 521of the wall of the hot dip tank 5 for electroplating the surfaces of theworkpieces 30;

5. the workpieces 30 pass through the second air knife 6 and the secondpre-heater 7 for drying and solidifying the electroplating solution onthe surfaces of the workpieces 30;

6. the workpieces 30 pass through the epoxy spray chamber 8 for sprayingepoxy on the surfaces of the workpieces 30; and

7. the workpieces 30 pass through the cooling chamber 9 for cooling andpassivating to get the finished products, and the finished products aredelivered to the rebar collection rack 20.

The feature of the present invention is that each device is providedwith a moving channel through which the workpieces can pass. Theaforesaid structure is just a preferred embodiment of the presentinvention. The length of the rolling conveyer can be changed accordingto the demand.

Although particular embodiments of the present invention have beendescribed in detail for purposes of illustration, various modificationsand enhancements may be made without departing from the spirit and scopeof the present invention. Accordingly, the present invention is not tobe limited except as by the appended claims.

What is claimed is:
 1. A galvanising and epoxy-coating production line,comprising a sandblasting machine, an assisting plating machine, a firstair knife, a first pre-heater, a hot dip tank, a second air knife, asecond pre-heater, an epoxy spray chamber, and a cooling chamber whichare arranged sequentially according to a workflow; the assisting platingmachine, the first air knife, the first pre-heater, the hot dip tank,the second air knife, the second pre-heater, the epoxy spray chamber,and the cooling chamber being each provided with a moving channelthrough which workpieces pass; between the devices being provided with arolling conveyer on which the workpieces run.
 2. The galvanising andepoxy-coating production line as claimed in claim 1, wherein theassisting plating machine includes upper and lower rows of assistingplating heads, and between the upper and lower rows of assisting platingheads is the moving channel for the workpieces to pass through theassisting plating machine
 3. The galvanising and epoxy-coatingproduction line as claimed in claim 1, wherein the first air knife andthe second air knife have an identical structure, the first air knifecomprises a triangular frame, an air wall of the triangular frame isprovided with a plurality of air nozzles, a middle portion of thetriangular frame is defined as the moving channel for the workpieces topass through the first air knife.
 4. The galvanising and epoxy-coatingproduction line as claimed in claim 1, wherein the first pre-heater andthe second pre-heater have an identical structure, the first pre-heatercomprises a support, a guide pipe, and a heating wire, the guide pipe isinstalled on the support, the support is fixed on the ground, theheating wire is wound on the guide pipe, the guide pipe is provided witha plurality of guide holes, and the guide holes are the moving channelfor the workpieces to pass through the first pre-heater.
 5. Thegalvanising and epoxy-coating production line as claimed in claim 1,wherein the hot dip tank comprises a big tank, a small tank, and anelectroplating solution circulatory system, the small tank is placed inthe big tank, an upper portion of the small tank is beyond a top of thebig tank, two opposing walls of the small tank, beyond the big tank, areformed with through holes respectively, the through holes of the twoopposing walls of the small tank are disposed at an axis, the throughholes of the two opposing walls of the small tank are the moving channelfor the workpieces to pass through the hot dip tank.
 6. The galvanisingand epoxy-coating production line as claimed in claim 1, wherein theepoxy spray chamber includes upper and lower rows of epoxy spray heads,between the upper and lower rows of epoxy spray heads is the movingchannel for the workpieces to pass through the epoxy spray chamber. 7.The galvanising and epoxy-coating production line as claimed in claim 1,wherein between the sandblasting machine and the assisting platingmachine, between the first air knife and the first pre-heater, betweenthe first pre-heater and the hot dip tank, between the second pre-heaterand the epoxy spray chamber, and between the epoxy spray chamber and thecooling chamber is provided with the rolling conveyer on which theworkpieces run.